The Data API Response Help

What do the letters in the data columns represent? There is a different set of columns returned for different types of data.

Preliminary Water Level

Field Description
t Time - Date and time of the observation
v Value - Measured water level height
s Sigma - Standard deviation of 1 second samples used to compute the water level height
f Data Flags - in order of listing:
-- (O) Count of number of 1 second samples that fall outside a 3-sigma band about the mean
-- (F) A flag that when set to 1 indicates that the flat tolerance limit was exceeded
-- (R) A flag that when set to 1 indicates that the rate of change tolerance limit was exceeded
-- (L) A flag that when set to 1 indicates that either the maximum or minimum expected water level height limit was exceeded
q Quality Assurance/Quality Control level
-- p = preliminary
-- v = verified

Verified Water Level

Field Description
t Time - Date and time of the observation
v Value - Measured water level height
s Sigma - Standard deviation of 1 second samples used to compute the water level height
f Data Flags - in order of listing:
-- (I) A flag that when set to 1 indicates that the water level value has been inferred
-- (F) A flag that when set to 1 indicates that the flat tolerance limit was exceeded
-- (R) A flag that when set to 1 indicates that the rate of change tolerance limit was exceeded
-- (T) A flag that when set to 1 indicates that either the maximum or minimum expected water level height limit was exceeded
q Quality Assurance/Quality Control level
-- p = preliminary
-- v = verified

Hourly Height

Field Description
t Time - Date and time of the observation
v Value - Measured water level height
s Sigma - Standard deviation of 1 second samples used to compute the water level height
f Data Flags - in order of listing:
-- (I) A flag that when set to 1 indicates that the water level value has been inferred
-- (L) A flag that when set to 1 indicates that either the maximum or minimum expected water level height limit was exceeded

High Low

Field Description
t Time - Date and time of the observation
v Value - Measured water level height
ty Type - Designation of Water level height. HH = Higher High water, H = High water, L = Low water, LL = Lower Low water
f Data Flags - in order of listing:
-- (I) A flag that when set to 1 indicates that the water level value has been inferred
-- (L) A flag that when set to 1 indicates that either the maximum or minimum expected water level height limit was exceeded

Daily Mean

Field Description
t Time - Date and time of the observation
v Value – Mean hourly data over a 24 hour period
f Data Flags - in order of listing:
-- (I) A flag that when set to 1 indicates that the water level value has been inferred
-- (L) A flag that when set to 1 indicates that either the maximum or minimum expected water level height limit was exceeded

Monthly Mean

Field Description
year Year
month Month
highest Highest Tide
MHHW Mean Higher-High Water
MHW Mean High Water
MSL Mean Sea Level
MTL Mean Tide Level
MLW Mean Low Water
MLLW Mean Lower-Low Water
DTL Mean Diurnal Tide Level
GT Great Diurnal Range
MN Mean Range of Tide
DHQ Mean Diurnal High Water Inequality
DLQ Mean Diurnal Low Water Inequality
HWI Greenwich High Water Interval (in Hours)
LWI Greenwich Low Water Interval (in Hours)
lowest Lowest Tide
inferred A flag that when set to 1 indicates that the water level value has been inferred

One Minute Water Level

Field Description
t Time - Date and time of the observation
v Value - Measured water level height

Tide Predictions

Field Description
t Time - Date and time of the observation
v Value - Predicted water level height

Air Gap

Field Description
t Time - Date and time of the observation
v Value - Measured air gap
s Sigma - Standard deviation of 1 second samples used to compute the air gap
f Data Flags - in order of listing:
-- (O) Count of number of 1 second samples that fall outside a 3-sigma band about the mean
-- (F) A flag that when set to 1 indicates that the flat tolerance limit was exceeded
-- (R) A flag that when set to 1 indicates that the rate of change tolerance limit was exceeded
-- (A) A flag that when set to 1 indicates that either the maximum or minimum expected air gap limit was exceeded

Wind

Field Description
t Time - Date and time of the observation
s Speed - Measured wind speed
d Direction - wind direction in degrees
dr Direction - wind direction in text
g Gust - Measured wind gust speed
f Data Flags - in order of listing:
-- (X) A flag that when set to 1 indicates that the maximum wind speed was exceeded
-- (R) A flag that when set to 1 indicates that the rate of change tolerance limit was exceeded

Air Pressure

Field Description
t Time - Date and time of the observation
v Value - Measured air pressure
f Data Flags - in order of listing:
-- (X) A flag that when set to 1 indicates that the maximum expected air pressure was exceeded
-- (N) A flag that when set to 1 indicates that the minimum expected air pressure was exceeded
-- (R) A flag that when set to 1 indicates that the rate of change tolerance limit was exceeded

Air Temperature

Field Description
t Time - Date and time of the observation
v Value - Measured air temperature
f Data Flags - in order of listing:
-- (X) A flag that when set to 1 indicates that the maximum expected air temperature was exceeded
-- (N) A flag that when set to 1 indicates that the minimum expected air temperature was exceeded
-- (R) A flag that when set to 1 indicates that the rate of change tolerance limit was exceeded

Visibility

Field Description
t Time - Date and time of the observation
v Value - Measured visibility

Humidity

Field Description
t Time - Date and time of the observation
v Value - Measured humidity
f Data Flags - in order of listing:
-- (X) A flag that when set to 1 indicates that the maximum expected humidity was exceeded
-- (N) A flag that when set to 1 indicates that the minimum expected humidity was exceeded
-- (R) A flag that when set to 1 indicates that the rate of change tolerance limit was exceeded

Water Temperature

Field Description
t Time - Date and time of the observation
v Value - Measured water temperature
f Data Flags - in order of listing:
-- (X) A flag that when set to 1 indicates that the maximum expected water temperature was exceeded
-- (N) A flag that when set to 1 indicates that the minimum expected water temperature was exceeded
-- (R) A flag that when set to 1 indicates that the rate of change tolerance limit was exceeded

Conductivity

Field Description
t Time - Date and time of the observation
v Value - Measured conductivity
f Data Flags - in order of listing:
-- (X) A flag that when set to 1 indicates that the maximum expected conductivity was exceeded
-- (N) A flag that when set to 1 indicates that the minimum expected conductivity was exceeded
-- (R) A flag that when set to 1 indicates that the rate of change tolerance limit was exceeded

Salinity

Field Description
t Time - Date and time of the observation
s Salinity
g Specific Gravity

Currents

Field Description
t Time - Date and time of the observation
s Speed - Measured current speed
d Direction - current direction in degrees
b Bin number